Air valve



June 24, 1930. w. A. RUSSELL 4AIR VALVE w114 inn Filed April 30, 1927 Patented June 24, 1930 UNITED sTATEs PATENT orf-ICE A WILLIAM A. RUSSELL, OF YONKERS, NEW YORK, ASSIGNOR T W. A. RUSSELL & CO.,

OF NEW YORK, N. Y., A CORPORATION 0F NEW YORK AIR VALVE Application filed April 3o, 1927'. serial No..` 187,735. i

This invention relates to certain improvements in air valves for steam radiators and the like.

Air valves are used with steam radiators to provide communication between the radiator and the outer air, and it is the function of these valves to permit escape of air in the radiator' to the atmosphere, the valve closing after the air has been driven out to prevent discharge of the steam through the valve.

In certain types of these valves there is provided a single walled casing having means for attaching it to a radiator in which works a Valve body which controls an air vent in the casing. This valve has to be spaced a sufficient distance from the inner walls of the casing to provide for the necessai-y air circulation. It sometimes happens that with a single wall casing the valve will tip and become jammed so that it cannot function to open and close the air vent, thus rendering the valve inoperative.

It is the especial object of the present invention to improve the construct-ion of these single casing valves by the provision of a guide which will effectually prevent the tipping or tilting of the valve, so that the valve will operate under conditions of use.

It is a further object of the invention to provide a construction which shall be cheap, and not add greatly to the cost of production of the valve.

Vith these and other objects not specifically referred to, the invention consists in certain novel parts, arrangements and combinations which will be described in connection with the accompanying drawings and the novel features pointed out in the claims hereunto annexed.

In these drawings,-

Figure 1 is a vertical sectional view showing the improved valve positioned on a radiator, and

Figure 2 is a view of the improved guide.

Referring `now to these drawings, the air valve comprises a single casing 1 formed with a base 2 threaded thereto, the base being provided with a nipple 3 by which it may be threaded into the wall of a radiator 4,

this nipple being secured tothe vbasel in any suitable manner. A siphontube 5r of usual form passes through the nipple connecting the interior of the casing and the radiator.

The upper'part of the casing is provided with' an air vent formed in a channeled plug 6, preferably for adjustment, threaded in a depending flange 7 vconveniently formed by turning in the metal of the casing. The channel 8 of the plug opens to the atmosphere, vand the lower end ofthe channel is widened to form avalve seat 9.

Working within the casing 1 is a valve 10 in the form of an elongated hollow body having a nipple ll'for closing th'e'channel 8, the nipple having a coned end 9. In the particular construction shown, the valve 10 is an expansion valve having a bottom l2 of light metal which will flex under pressure, the valve being filled with a volatile liquid, as alcohol. Where this type of valve is employed, the casing is provided with an abutment in the form of a raised portion 13 formed by bending in the metal of the casing. The upper surface of this abutment is preferably provided with raised portions 14 with openings between to prevent the valve from sticking.

Between the valve 10 and the inner wall of the casing is an air passage 15, this passage being of suitable dimensions to allow free passage of air and steam through the valve, the valve 10 being spaced from the walls of the casing to provide this passage.

In accordance with the invention there is provided a guide of improved construction by which the valve is prevented from tilting and becoming jammed. While the specific construction of this guide may be somewhat varied, it will be so formed and arranged as not to interfere with the free passage of air and steam around the valve. As shown, the base 2 of the valve casing and the lower part of the valve 10 are of somewhat greater diameter than the rest of the parts, and the guide is preferably located above this enlarged part of the valve. The guide shown comprises a ring 16 of light metal suitably secured as by solder to the inner wall of the casing, this ring being provided with spaced projections 17 extending across the air passage 15 and embracing the valve With a loose lit, so that the valve may work freely up and down between the projections. This guide llgeepsxthe: .yalye in. x,npvriglit, position S0 that/@Sehe wlw-rises andsfalls, it does S0 in subtsantially a straight line and cannot tilt sufficiently to become jammed. Furthermore.7 a..-\N,ery..simple andinexpensive air Valve constructionhas been provded.,.... i. While the invention has been described in what is considered its preferred form, it Will be understood that certain ,Variations may be made in the form'of the casing, float and guide lAyitlioiit departing romthe inventiony as defined linthe appended claims.

WhefLcaimj-is; an jair yalvej :combination-of: a singleawallcd x cilsinagf and Emeans {for- `seeming QaSiHgiSPaQ/d, flemthe nnerfwalle thereof te fermanfar'mssgef af rnghernge vertical @ange 1sepureduto, the inne);g Walls oi thecasr ngftRPOi/@Gtng-.flpseextendina across-the air pa.ssage,iygithl Wideg air openingsmbetween the projections andv freely engagingnthe Yajlye, and l,ahnairvvent in the casing controlled by theslfahfif', "Wsw f .ifi Initw A stmony whereof, I have hereunto set my hand ne.

c WILLIAM A. RUSSELL. 

